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Clematis -
by Steven D. Glenn
Not peer reviewed
Last modified: 09/07/2006
Nomenclature
Clematis L., Sp. Pl. 1: 543. 1753; Gen. Pl., ed. 5, 242. 1754. Clematitis Moench, Meth. Pl. 296. 1794. LECTOTYPE: Clematis vitalba L. designated by Britton & Brown (1913).
Key to the species of Clematis
1. Leaves simple (at least at the base of young shoots), (commonly
cultivated)...Clematis ×jackmanii
1. Leaves compound...2
2. Flowers numerous in each inflorescence, borne in panicles of
cymes, rarely simple cymes...3
2. Flowers 1-3 in each
inflorescence, borne solitary or in simple cymes...4
3. Leaflets mostly 3, margins coarsely serrate to dentate...Clematis virginiana
3. Leaflets mostly 5,
margins entire...Clematis
terniflora
4. Flowers 100-120 mm wide, (commonly cultivated)...Clematis
×jackmanii
4. Flowers 30-80 mm wide...Clematis occidentalis
List of Clematis Species
- Clematis ×jackmanii - excluded species
- Clematis occidentalis
- Clematis terniflora
- Clematis virginiana
- Clematis viticella